Method of constructing, repairing, and widening concrete roads



May 5, 1936. J w s T I 2,039,420

METHOD OF CONSTRUCTING, REPAIRING, AND WIDENING CONCRETE ROADS FiledJuly 29, 1935 2 Sheets-Sheet l 1935- J. w. ISETT 2,039,420

METHOD OF CONSTRUCTING, REPAIRING, AND WIDENING CONCRETE RQADS FiledJuly 29, 1955' 2 Sheets-Sheet 2 (70km wink/[sew Patented May 5, 1936METHOD OF CONSTRUCTING, REPAIRING,

' AND WIDENING CONCRETE ROADS John Warren Isett, Hinsdale, 111.Application July 29, 1935, Serial No. 33,682

6 Claims.

This invention relates to new and improved methods of constructing,repairing and widening concrete roads.

The main object of the invention is to provide a method whereby concreteroads may be constructed in sections and the sections may be retained intheir intended positions relatively to each other and undesirablemovement of the secv tions may be prevented.

Heretofore, for the purpose of tying the two sections of the roadtogether and transmitting a portion of the wheel load from one sectionto the other, it has been customary to embed in the concrete beingpoured to form a section of road, a plurality of uniformly spaced rodsusually made of metal and approximately 4 feet in length, about half ofeach rod being embedded, and to bend each rod so the free half extendsat a right angle to the embedded portion and lies closely adjacent tothe side surface of the concrete between the concrete and the form. Whenthe form is removed, some of the free ends of the rods are pulled awayfrom the section in which they are partly embedded and thus protrudewhile the adjacent road bed is being graded and prepared for pouringconcrete thereon. ing is completed and before the next concrete sectionis poured, the bent rods are straightened so as to extend in alignmentwith the embedded portion, into the concrete to be poured to form thenext adjacent section. This method'has serious disadvantages due to thefact that the protruding portions of the rods frequently are broken offor the steel is fractured by contact with the grading machinery and thebending and subsequent straightening of the rods weakens them and causesbreakage thereby defeating their intended P p One of the objects of myinvention is to provide means for tying together adjacent, separatelyformed sections of concrete roads without the use of tying means or sliprods which protrude from one section while an adjacent section is beinggraded or prepared.

Another object is to obviate the necessity for increasing the thicknessof the concrete at and near the inner edges of adjacent sections whichis unnecessary and expensive. By my method a portion of the wheel loadis transmitted to the adjacent slab thereby making the thickened inneredges of the two sections unnecessary.

Another object is to obviate the necessity for increasing the thicknessof the concrete at and near the inner edges of the adjacent sections inmultiple lane roads poured in sections, in which After the gradtheproximate edges of adjacent sections are provided with the conventionalgroove and hinge construction. By my method the complemental concave andconvex edges of the adjacent sections are securely tied together andwill not sepa- 5 rate through contraction or expansion of the concreteor from any other cause.

In the drawings- Fig. 1 is a plan view of adjacent sections of concreteroad constructed according to the meth- 0 0d of my invention.

Fig. 2 is a vertical sectional view through part of a section ofconcrete road and the removable wood form used in the construction ofsame. Fig. 3 is a vertical sectional View of the section 15 shown inFig. 2 with the form removed and a second section of concrete adjacentto the first section.

Fig. 4 is an enlarged section taken on the line 4-4 of Fig. 2.

Fig. 5 is a vertical sectional view similar to Fig. 2 showing part of asection of concrete road provided with a vertical tongue and groovemetal plate for forming a groove in the joint to produce a hinge-likeeffect between the two sections of 25 concrete and also showing the formused in constructing the section.

Fig. 6 is a vertical sectional view showing the section illustrated inFig. 5 with the form re-' moved and with another concrete section adja-30 cent the first mentioned section.

Fig. 7 is a vertical sectional view similar to Figs.

2 and 5, showing a concrete section provided with another form ofvertical plate for producing a plane of weakness in the finishedroadway, and 35 showing the form used in constructing the section.

Fig. 8 is a vertical sectional view showing the concrete section of Fig.'7 with the form removed and another concrete section adjacent to said40 first section.

Figs. 9, 10 and 11 showmodified forms of part of the means for tyingadjacent sections together in accordance with the method of myinvention.

Fig. 12 shows a round, smooth rod threaded on 45 one end.

Referring to that embodiment of my invention illustrated in Figs. 1 to4, inclusive, adjacent concrete sections are indicated at Ill and H.These sections may be sections which are disposed either 50 transverselyor longitudinally of the road. A plurality of metal inserts or anchoringdevices indicated as a whole at l2 each comprise an end disc l3, a bodymember I! which is cross shaped in cross section to form ribs l5 mergingwith the 55 disc I3 and a tubular body portion I6 which is internallyscrew threaded at H. The mouth of the tubular body I6 is provided withflanges I8 cut away at I9 to provide recesses for nails 20. According tothe method of my invention conventional forms 2I are used to confine theconcrete section III. The inserts I2 are nailed to the inner surface ofthat part of the form which defines the edge which will be adjacent toanother concrete section. After the inserts have been fixed in theirintended positions, from 2 to 5 feet apart, the concrete is poured toform the section I II. In due course the form 2I is removed and theflanged mouths of the internal screw threaded tubular bodies I6 areexposed. After the grading for the adjacent section II has beencompleted, hook bolts'22 or other suitable devices such as stud bolts,threaded rods, smooth or deformed, anchor bolts or thelike, having screwthreaded ends 23, are screwed into the tubular bodies I6 as indicated inFigs. 1 and 3. The concrete to form the section II is then pouredadjacent the section III to cover the devices 22. Thus separately formedsections of concrete are tied together efficiently and undesiredrelative movement of the sections is prevented. When sections locatedtransversely of the roadway are constructed according to my invention, Iprefer to use hook shaped tying devices 22 or other suitably formeddevices which tie the concrete sections together, whereas betweensections which extend longitudinally of the roadway I prefer to usesmooth bolts or shear bars painted and greased so as to permit relativemovement between the sections longitudinally of the roadway.

Assuming that the concrete sections I and II shown in Fig. 1 are locatedtransversely of the roadway and that the dividing line between the twosections extends longitudinally of the roadway, I preferably use tyingdevices such as those illustrated at 22 in Figs. 1 to 4 for extendingacross said longitudinal line and use plain bolts or shear bars placedadjacent and parallel to said longitudinal joint for extending acrossthe transverse joints between sections located longitudinally of theroad. This arrangement will permit free movement of the plain bolts orshear bars in one section of the concrete and present the full sectionof the bolts or bars for load transmission.

The screw threaded ends of the smooth bolts or shear bars are insertedin the anchoring devices or inserts I2 after the first section has beenformed, and the smooth ends are left free to slip in the adjacentsection of concrete, thereby allowing for contraction and expansion ofthe two sections, longitudinally of the road, and permitting expansionjoints to be used in transverse joints or cracks.

Referring to that embodiment of the invention shown in Figs. and 6, theadjacent concrete sections III and II indicate sections disposedtransversely of the road and separated by a vertically disposed plate 26for producing the conventional grooved longitudinal center joint. Theplate 26 is known as a groove form plate and when used in constructingroads according to my invention is provided with a plurality ofapertures 21 spaced apart two to five feet, longitudinally of the plate.In this embodiment of the invention the form 24 is similar to the form2I heretofore mentioned except that it may be made out of steel or woodand is provided with apertures 25 which register with the apertures 21of the plate 26. After the form 24 has been set up to define the sectionIII, the plate 26 is positioned adjacent the inner surface of that partof the form which defines the side margin of the concrete adjacent thesection II to be subsequently poured. Inserts I2 and the plate 26 suchas heretofore described, are held in place by means 5 of headed bolts 28which extend through the apertures in the form 24 and plate 26 into thescrew threaded bodies I6 of the inserts. The inserts are spaced two tofive feet apart, longitudinally of the form 24, and between the upperand lower edges of the form. After the concrete III has been poured thebolts 28 and form 24 are removed. If desired the grooved plate 26 mayalso be removed to be used again for forming other sections. The removalof the form 24 or of the form and plate will expose the internally screwthreaded portion II of the anchoring devices or inserts I2 at thatvertical face of the section III which will abut the adjacent section II. After the grading for the section I I has been completed, hook bolts22, straight bolts, threaded rods or other suitable devices are screwedinto the inserts I2 and then the concrete to form the section II ispoured adjacent the section III to cover the devices 22. The shape ofthe grooved plate 26 produces a hinge-like joint between the concretesections Ill and I I which is held securely together by means of thetying devices without the unnecessary and uneconomical use of thickenedcenter joints, thereby effecting a great saving in concrete.

Referring to that embodiment of the invention illustrated in Figs. 7 and8, a straight plate 29, apertured at 30, is shown in lieu of the groovedplate 26. As heretofore described, the form 24, apertured at to registerwith the apertures 30 of the plate 29, is set up to define the sectionI0 to be poured. The plate 29 is positioned adjacent the inner surfaceof that part of the form 24 which defines the edge of the section IIIwhich will abut the section I I. The inserts I2 are fixed in theirintended positions by bolts 28 extending through the form 24 and plate29 into the screw threaded bodies I6 of said inserts I2. After theconcrete III has been poured and becomes set, the bolts 28 and form 24are removed, thus exposing the plate 29 and internally screw threadedportion I! of the inserts I2. As previously explained, suitable tyingdevices such as the hook bolts 22 or devices 3|, 32, 33 or 34 arescrewed into the inserts I2 and the concrete to form the section I I ispoured adjacent the section III to cover said tying devices.

It will be understood that the method herein described may be used inthe construction, repairing, widening and resurfacing of roads, and thatthe form of the inserts and tying devices herein shown and described maybe varied without departing from the scope of my invention. An importantfeature of the invention lies in the forming of reinforced screwthreaded bores in the side of the concrete of one section adjacent towhich another section is to be formed, whereby tying means may be fixedin one section to extend into another after the first section has been 6formed and the grading and preparatory work for the second section hasbeen completed.

While I prefer to use the internally screw threaded form of anchoringdevices I2 herein shown and described, my invention is not limited 7thereto, and I may use other forms of anchoring devices which areadapted to be embedded in the concrete as it is being poured andthereafter attach to an exposed portion of the anchoring device, afterthe concrete has been formed, suit- 7 able tying devices -to. beembedded in the concrete to be poured to form an adjacent section. It isalso to be understood that when I refer to tying devices" in the claimsI do not intend to be limited to hook or angle shaped devices but intendto include as well those types of tying devices which are adapted topermit relative movement of adjacent sections.

I claim:'

1. The method of constructing concrete roads which comprises embedding aplurality of nonprotruding anchoring devices in the side of one sectionof concrete at the time the concrete is poured, attaching tying devicesto said anchoring devices after the concrete has been -formed, andpouring concrete toiorm an adjacent section and thereby embedding thetying devices secured to the first section;

2. The method of constructing concrete roads which comprises setting upa form confining a concrete section to be formed, ailixing to the form,between the upperand lower edges of the form and within the form, aplurality of spaced apart non-protruding anchoring devices, pouringconcrete'within the form to cover the anchoring devices, removing theform and'exposing theends of the anchoring devices, securing tyingdevices to the anchoring devices so as to project in a substantiallyhorizontal plane from said anchoring devices, and pouring a secondconcrete section adjacent the first and thereby embedding said tyingdevices in said adjacent section.

3. The method of constructing concrete roads which comprises setting upa form confining a concrete section to be formed, afiixing to the form,between the upper and lower edges of the form, a plurality of spacedapart, internally screw threaded anchoring devices, pouring concretewithin the form to cover the anchoring devices, removing the form andexposing the ends of the anchoring devices, screwing tying devices intothe internally threaded anchoring devices so as to project from saidanchoring devices, and

pouring a second concrete section adjacent the first and therebyembedding said tying devices-in said adjacent section.

4. The method of constructing concrete roads which comprises setting upaform defining a concrete section to be formed, positioning adjacent theform a vertical, apertured plate, af-

fixing to the plate and the form a plurality of I spaced apart,internally screw threaded anchoring devices, pouring concrete within theform to cover-the anchoring devices, removing the form and therebyexposing the apertured plate and internally screw threaded ends of theanchoring devices, screwing tying devices into the anchoring devices toproject beyond said concrete section and plate, and pouring a secondconcrete section adjacent the first and thereby embedding said tyingdevices in said adjacent section.

'5. The method of constructing concrete roads which comprises setting upa form defining a concrete section to be formed, positioning adjacentthe form an apertured, grooved, hingeproducing plate, affixing to thehinge-producing plate and the form a plurality 'of spaced apartanchoring devices, pouring concrete within the form to cover theanchoring devices, removing the form and grooved plate and therebyexposing the ends of the anchoring devices, securing tying devices tothe anchoring devices to project beyond said concrete section, andpouring a second concrete section adjacent the first and therebyembedding said tying devices in said adjacent section.

6. The method of constructing concrete roads which comprises setting upa form defining a concrete section to be formed, positioning adjacentthe forman apertured, grooved, hingeproducing plate, afiixing to thehinge-producing plate and the form a plurality of spaced apart,internally screw threaded anchoring devices, pouring concrete within theform to cover the anchoring devices, removing the form and therebyexposing the apertured hinge-producing plate and the internally screwthreaded ends of the anchoring devices, screwing tying devices into theanchoring devices to project beyond said concrete section and plate, andpouring a second concrete section adjacent the first and therebyembedding said tying devices in said adjacent 1

